Update CHANGELOG after 2.8.3 release

Signed-off-by: Vacha Shah <vachshah@amazon.com>

CHANGELOG.md

@@ -13,10 +13,24 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 ### Removed
 
 ### Fixed
-- Fix PutTemplateRequest field deserialization ([#723](https://github.com/opensearch-project/opensearch-java/pull/723))
 
 ### Security
 
+## [2.8.3] - 02/12/2024
+### Added
+
+### Dependencies
+
+### Changed
+
+### Deprecated
+
+### Removed
+
+### Fixed
+- Fix PutTemplateRequest field deserialization ([#723](https://github.com/opensearch-project/opensearch-java/pull/723))
+- Fix InnerHits to no longer enforce the nullable Index field when converting to Hit. ([#838](https://github.com/opensearch-project/opensearch-java/pull/838))
+
 ## [2.8.2] - 02/07/2024
 ### Added
 - Added support for icu_collation_keyword type ([#725](https://github.com/opensearch-project/opensearch-java/pull/725))
@@ -255,7 +269,8 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
 ### Security
 
-[Unreleased 2.x]: https://github.com/opensearch-project/opensearch-java/compare/v2.8.2...2.x
+[Unreleased 2.x]: https://github.com/opensearch-project/opensearch-java/compare/v2.8.3...2.x
+[2.8.3]: https://github.com/opensearch-project/opensearch-java/compare/v2.8.2...v2.8.3
 [2.8.2]: https://github.com/opensearch-project/opensearch-java/compare/v2.8.1...v2.8.2
 [2.8.1]: https://github.com/opensearch-project/opensearch-java/compare/v2.8.0...v2.8.1
 [2.8.0]: https://github.com/opensearch-project/opensearch-java/compare/v2.7.0...v2.8.0